Trying this notebook: https://github.com/Xilinx/DPU-PYNQ/blob/master/pynq_dpu/notebooks/dpu_mnist_classifier.ipynb
The MNIST pip package will download data from Yann LeCun's website http://yann.lecun.com/exdb/mnist/
The website isn't available anymore, a PR in the MNIST package gives a mirror: datapythonista/mnist#20
Maybe adding this somewhere in the Readme file ?